1. Where do molecules tend to move during diffusion?

A. Up the concentration gradient

B. Down the concentration gradient

C. From an area of lower concentration to an area of higher concentration

D. In a direction that does not depend on concentration

2. When the concentration of a solute inside and outside a cell is the same, the

cell has reached?

A. Homeostasis

C. Osmotic Pressure

B. Equilibrium

D. Maximum concentration

3. The diffusion of water across a semi-permeable membrane is called?

A. Osmosis

C. Passive transport

B. Active transport

D. Facilitated diffusion

4. Gases like oxygen and carbon dioxide move across cell membranes using?

A. Osmosis

C. Simple diffusion

B. Phagocytosis

D. Facilitated diffusion

5. How do large, polar molecules and ions move across the cell membrane?

A. Osmosis

C. Simple diffusion

B. Phagocytosis

D. Facilitated diffusion
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